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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * OpenSPARC T2 Processor File: buffer.H | |
5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
7 | * | |
8 | * The above named program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public | |
10 | * License version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * The above named program is distributed in the hope that it will be | |
13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public | |
18 | * License along with this work; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
20 | * | |
21 | * ========== Copyright Header End ============================================ | |
22 | */ | |
23 | // ========== Copyright Header Begin ========================================== | |
24 | // | |
25 | // OpenSPARC T2 Processor File: buffer.H | |
26 | // Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
27 | // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
28 | // | |
29 | // The above named program is free software; you can redistribute it and/or | |
30 | // modify it under the terms of the GNU General Public | |
31 | // License version 2 as published by the Free Software Foundation. | |
32 | // | |
33 | // The above named program is distributed in the hope that it will be | |
34 | // useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
35 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
36 | // General Public License for more details. | |
37 | // | |
38 | // You should have received a copy of the GNU General Public | |
39 | // License along with this work; if not, write to the Free Software | |
40 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
41 | // | |
42 | // ========== Copyright Header End ============================================ | |
43 | #ifndef _BUFFER_H | |
44 | #define _BUFFER_H | |
45 | ||
46 | #include <stdlib.h> | |
47 | #include <sys/types.h> | |
48 | ||
49 | typedef struct { | |
50 | rstf_unionT* rst; | |
51 | unsigned nrecs; | |
52 | } RstSplit; | |
53 | ||
54 | class RstzipBuffer { | |
55 | public: | |
56 | rstf_unionT* rstbuf; | |
57 | int nrecs; | |
58 | int curindex; | |
59 | ||
60 | RstzipBuffer(int bufsize) { | |
61 | rstbuf = (rstf_unionT*) malloc((bufsize + PADDING) * sizeof(rstf_unionT)); | |
62 | nrecs = 0; | |
63 | curindex = 0; | |
64 | buffersize = bufsize; | |
65 | } | |
66 | ||
67 | ~RstzipBuffer() { | |
68 | free(rstbuf); | |
69 | } | |
70 | ||
71 | int fillBuffer(rstf_unionT* buf, int bufrecs) { | |
72 | if (nrecs + bufrecs < buffersize + PADDING) { | |
73 | memcpy(&rstbuf[nrecs], buf, bufrecs * sizeof(rstf_unionT)); | |
74 | nrecs += bufrecs; | |
75 | } else { | |
76 | fprintf(stderr, "Error: in FillRstBuffer::fillBuffer(): nrecs=%d, bufrecs=%d, max buffersize is %d\n", | |
77 | nrecs, bufrecs, buffersize + PADDING); | |
78 | exit(1); | |
79 | } | |
80 | ||
81 | return nrecs; | |
82 | } | |
83 | ||
84 | int getLastCpuRecIndex() { | |
85 | int i; | |
86 | ||
87 | for (i = nrecs - 1; i >= 0; i--) { | |
88 | if (rstbuf[i].proto.rtype == CPU_T) { | |
89 | break; | |
90 | } | |
91 | } | |
92 | ||
93 | return i; | |
94 | } | |
95 | ||
96 | int shiftBuffer(int index) { | |
97 | if (index > nrecs) { | |
98 | fprintf(stderr, "Error: in RstzipBuffer::shiftBuffer() index (%d) > nrecs (%d)\n", index, nrecs); | |
99 | exit(1); | |
100 | } | |
101 | ||
102 | if (index > 0) { | |
103 | // Only do this if we have something to move. | |
104 | // index = 0 when we flush this buffer; index = -1 when we're done decompressing. | |
105 | nrecs -= index; | |
106 | memmove(&rstbuf[0], &rstbuf[index], nrecs * sizeof(rstf_unionT)); | |
107 | } else { | |
108 | nrecs = 0; | |
109 | } | |
110 | ||
111 | curindex = 0; | |
112 | ||
113 | return nrecs; | |
114 | } | |
115 | ||
116 | protected: | |
117 | enum { | |
118 | PADDING = 1000 | |
119 | }; | |
120 | ||
121 | int buffersize; | |
122 | }; // RstzipBuffer | |
123 | ||
124 | #endif // _BUFFER_H |